999424513 has 2 divisors, whose sum is σ = 999424514. Its totient is φ = 999424512.

The previous prime is 999424507. The next prime is 999424561. The reversal of 999424513 is 315424999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807241744 + 192182769 = 28412^2 + 13863^2 .

It is a cyclic number.

It is not a de Polignac number, because 999424513 - 2⁹ = 999424001 is a prime.

It is equal to p_50819986 and since 999424513 and 50819986 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (999424213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499712256 + 499712257.

It is an arithmetic number, because the mean of its divisors is an integer number (499712257).

Almost surely, 2^999424513 is an apocalyptic number.

It is an amenable number.

999424513 is a deficient number, since it is larger than the sum of its proper divisors (1).

999424513 is an equidigital number, since it uses as much as digits as its factorization.

999424513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 46.

The square root of 999424513 is about 31613.6760437631. The cubic root of 999424513 is about 999.8081341899.

The spelling of 999424513 in words is "nine hundred ninety-nine million, four hundred twenty-four thousand, five hundred thirteen".